Date: Mon, 11 Oct 2004 14:26:06 +0100 From: Chris Elsworth <chris@shagged.org> To: Christian Hiris <4711@chello.at> Cc: freebsd-current@freebsd.org Subject: Re: RAID1 with gmirror Message-ID: <20041011132606.GA86235@shagged.org> In-Reply-To: <200410110026.03777.4711@chello.at> References: <20041010110159.GA91160@pcs28.suedfactoring.de> <200410101522.45548.4711@chello.at> <20041010165852.GA15854@shagged.org> <200410110026.03777.4711@chello.at>
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On Mon, Oct 11, 2004 at 12:25:46AM +0200, Christian Hiris wrote: > > > 4) bsdlabel -e ad0 [taking into account the new 16 byte offset] > > I never read about the new offset - until now I had no time to study the > gmirror code. Where did you find this interresting information? Here (and related thread): http://lists.freebsd.org/pipermail/freebsd-geom/2004-September/000313.html > An example in 'man gmirror' describes how to set up a gmirror array on a disk > with valid data. It uses 'gmirror lable' w/o extra labeling. I understand it > the way that the term 'valid data' means 'existing (non-gmirror-)data on an > already (before-gmirror-)labeled disk'. Maybe my understanding is wrong and > you gave me the hint to the reason why my mirrors break on startup. I will do > some testing on this. No, I get the mirrors breaking on startup too. I believe this is fixed in -CURRENT but is pending a MFC into RELENG_5 to fix. So, I'm left quite unsure whether the warnings are harmless or not. Pawel, can we just use existing labels on disks and apply a gmirror over it, or should we be re-labelling inside the mirror device? -- Chris
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